R first row by group

df <- data.frame(group=c("a", "b"), value=1:8)
## Order the data frame with the variable of interest
df <- df[order(df$value),]
## Aggregate
aggregate(df, list(df$group), FUN=head, 1)

Source: stackoverflow.com

Similar codes

0 vote367 views1 answer
How to change the numbering of rows in r
R
0 vote401 views2 answers
Count r
R
0 vote342 views1 answer
Get matrix row name r
R
0 vote374 views1 answer
R grid all possibilites between two vectors
R
1 vote355 views1 answer
Add column in r
R
0 vote344 views1 answer
R reverse vector
R
1 vote385 views1 answer
R print concatenate
R
0 vote361 views1 answer
Plot two variables
R
2 votes390 views2 answers
Read excel in r
R
0 vote352 views1 answer
Dummify data in r
R